Weighing instrument



FIG. 1 is a front, right side perspective view of the weighing instrument of the present invention;

FIG. 2 is a front, right side perspective view thereof with an element in a different position;

FIG. 3 is a front, right side perspective view thereof with an element in a different position;

FIG. 4 is a top view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a top view of another embodiment thereof.

Any other features not shown in the drawings do not form part of the claimed design. 

The ornamental design for a weighing instrument, as shown and described. 